An amorphous metal ribbon includes a plurality of laser irradiation mark rows each including a plurality of laser irradiation marks arranged in a row, in which when a distance between the laser irradiation mark rows that are adjacent to each other is set as d1, a distance between the laser irradiation marks in the laser irradiation mark row is set as d2, a diameter of the laser irradiation mark is set as d3, a depth of the laser irradiation mark is set as d4, and a volume occupancy rate V of the laser irradiation marks is set as (1/d1d3d4)(1/d2)100, the volume occupancy rate V of the laser irradiation marks is 0.00057% or more and 0.010% or less.

A high-frequency acceleration cavity core is a toroidal core obtained by winding an Fe-based magnetic ribbon having crystals with an average crystal grain size of 1 m or less, in which a space factor of the Fe-based magnetic ribbon is 40% or more and 59% or less, and a Qf value at 1 MHz is 310.sup.9 Hz or more. The average crystal grain size is preferably 0.1 m or less. The toroidal core preferably has a portion having a gap portion from an inner diameter to an outer diameter.

A magneto-sensitive wire for a magnetic sensor with both measurement range expansion and environment resistance performance improvement, includes a Co-based alloy containing more Fe than a reference composition that is amorphous overall and exhibits zero magnetostriction. The Co-based alloy may have an Fe ratio (Fe/(Co+Fe+Ni)) of 6.1% to 9.5%. The Fe ratio is an atomic fraction of the Fe amount with respect to the total amount of a magnetic element group consisting of Co, Fe, and Ni. By heating an amorphous wire of a Co-based alloy at a temperate at least equal to a crystallization start temperature and lower than a crystallization end temperature, allows the magneto-sensitive wire to have a composite structure in which crystal grains are dispersed in the amorphous phase. The magneto-sensitive wire's anisotropy field is, for example, 5 to 70 Oe and the stress sensitivity, indicative of magnetostriction, is 30 to 30 mOe/MPa.

Disclosed is a method for manufacturing a laminated body by laminating a plurality of iron-based amorphous alloy thin strips, in which the iron-based amorphous alloy thin strip is expressed by a composition formula T.sub.100-x-y-zSi.sub.x(B.sub.1-mC.sub.m).sub.yP.sub.z (where, T is at least one element selected from the group consisting of Fe, Co, and Ni and is a transition metal element necessarily containing Fe), and a thickness of the composition is 30 m or more and 60 m or less. The method includes: a pretreatment step S1 of subjecting a plurality of the iron-based amorphous alloy thin strips to heat treatment at a temperature of 200 C. or higher and lower than a crystallization temperature; an application step S2 of applying a thermosetting resin to at least one of a plurality of the iron-based amorphous alloy thin strips after the heat treatment to form an adhesive layer; and a thermocompression bonding step S3 of thermocompression-bonding a plurality of the iron-based amorphous alloy thin strips with the adhesive layer interposed therebetween to form the laminated body.

An inductor has a main magnet core, a coil mounted around the main magnet core, and a residual magnet encapsulating the main magnet core and partially encapsulating the coil. The main magnet core is made of a main magnet core powder containing amorphous iron base material and nickel base material powders. The residual magnet is made of a residual magnet powder containing a main magnet powder and a soft magnet powder including an iron-silicon-chromium alloy powder and a carbonyl iron powder. Thus, through a low-loss feature of the amorphous iron base material and nickel base material powders, a loss of the main magnet core is reduced. Furthermore, a magnetic permeability of the residual magnet matches a magnetic permeability of the main magnet core. A magnetic leakage is further avoided, and the alternating current resistance is reduced. A quality factor and a conversion efficiency are enhanced.

An Fe-based nanocrystalline alloy ribbon, the ribbon including an uneven structure on a surface of the ribbon, in which the uneven structure includes at least one recessed portion that extends along a longitudinal direction of the ribbon and that has a depth of 3 m or more, and the ribbon includes a magnetic domain that is formed along a width direction intersecting the longitudinal direction.

Proposed are a method of manufacturing an anisotropic rare-earth bulk magnet, the method being capable of suppressing formation of ReFe.sub.2 phase, and an anisotropic rare-earth bulk magnet having excellent magnetic properties.

Provided herein is a method for manufacturing a wound magnetic core of a nanocrystalline soft magnetic alloy ribbon.

The iron alloy particle is a particle including an iron alloy. The particle includes multiple mixed-phase particles, each including nanocrystals of 10 nm or more and 100 nm or less (i.e., from 10 nm to 100 nm) in crystallite size and an amorphous phase; and a grain boundary layer between the mixed-phase particles. Also, the iron alloy has a composition containing Fe, Si, P, B, C, and Cu.